Frequently Asked Questions
The normal pressure that should be exerted on a 215/40R17 tire is between 30 to 35 PSI. However, this air inflation might differ depending on your automobile needs and tire loading index. Always seek the specific tire-making specifications and the automobile manual.
The 215/40R17 metric sizing converts to a rough 24.6 inches overall diameter when mounted on a 17-inch wheel. The 215 denotes the 215mm tread width, whereas the 40 is the aspect ratio.
It stands for the following. The 215 indicates the tread width measured in millimeters, 40 stands for the aspect ratio, which is the sidewall height relative to the tread width also in millimeters, R means radial construction, and 17 marks the wheel diameter measured in inches.
Most of your 215/45R17 tires use about 30-35 PSI. Nevertheless, the 45 series tire is taller than the 40 series, but you may need to adjust the requested pressure slightly.
Depending on what type of tire the 215/40R17 are, the speed ratings will range from H – 130mph to max performance summer tires being Y – 186mph and greater. Generally, the higher the speed rating, the better the high-speed durability and handling.
